IEC 62052-21:2004

Electricity metering equipment (a.c.) - General requirements, tests and test conditions - Part 21: Tariff and load control equipment

IEC 62052-21:2004 specifies general requirements for the type test of newly manufactured indoor tariff and load control equipment, like electronic ripple control receivers and time switches that are used to control electrical loads, multi-tariff registers and maximum demand indicator devices. This bilingual version (2016-07) corresponds to monolingual version published in 2004-05.

Equipement de comptage d'électricité (c.a.) - Prescriptions générales, essais et conditions d'essai - Partie 21: Equipement de tarification et de contrôle de charge

L'IEC 62052-21:2004 spécifie les prescriptions générales pour les essais de type d'équipements neufs de tarification et contrôle de charge, de type intérieur, tels que des récepteurs de télécommande centralisée ou des horloges de tarification qui sont utilisés pour le contrôle de charges électriques, de registres multi-tarifs ou des dispositifs indicateurs de maximum. La présente version bilingue (2016-07) correspond à la version monolingue publiée en 2004-05.

General Information

• Status: Published
• Publication Date: 17-May-2004
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: TC 13 - Electrical energy measurement and control
• Drafting Committee: WG 11 - TC 13/WG 11
• Current Stage: PPUB - Publication issued
• Start Date: 30-Sep-2004
• Completion Date: 18-May-2004

Relations

• Replaces: IEC 61037:1990/AMD2:1998 - Amendment 2 - Electronic ripple control receivers for tariff and load control
• Effective Date: 05-Sep-2023
• Replaces: IEC 61038:1990/AMD2:1998 - Amendment 2 - Time switches for tariff and load control
• Effective Date: 05-Sep-2023
• Replaces: IEC 61038:1990 - Time switches for tariff and load control
• Effective Date: 05-Sep-2023
• Replaces: IEC 61037:1990 - Electronic ripple control receivers for tariff and load control
• Effective Date: 05-Sep-2023
• Amended By: IEC 62052-21:2004/AMD1:2016 - Amendment 1 - Electricity metering equipment (a.c.) - General requirements, tests and test conditions - Part 21: Tariff and load control equipment
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 62052-21
First edition
2004-05
Electricity metering equipment (a.c.) –
General requirements, tests and test conditions –
Part 21:
Tariff and load control equipment

Reference number
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INTERNATIONAL IEC
STANDARD 62052-21
First edition
2004-05
Electricity metering equipment (a.c.) –
General requirements, tests and test conditions –
Part 21:
Tariff and load control equipment

 IEC 2004  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale X
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 62052-21  IEC:2004(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6

1 Scope.7
2 Normative references.7
3 Terms and definitions .8
3.1 General definitions.9
3.2 Definitions related to electronic ripple control receivers .9
3.3 Definitions related to the ripple control code and to the control element .10
3.4 Definitions related to time switches .11
3.5 Definitions related to the output elements.12
3.6 Definitions of mechanical elements .13
3.7 Definitions of insulations .14
3.8 Definitions of influence quantities .15
3.9 Definition of tests.16
4 Standard electrical values .16
4.1 Standard reference voltage (U ).16
n
4.2 Standard reference frequency (f ) .16
n
5 Mechanical requirements and tests .16
5.1 General mechanical requirements .16
5.2 Case.17
5.3 Window.18
5.4 Terminals, terminal block(s), protective earth terminal.18
5.5 Terminal cover(s).19
5.6 Clearance and creepage distances.19
5.7 Insulating encased tariff and load control equipment of protective class II .20
5.8 Resistance to heat and fire.20
5.9 Protection against penetration of dust and water .21
5.10 Void.21
5.11 Void.21
5.12 Marking of tariff and load control equipment .22
6 Climatic conditions, requirements and tests.22
6.1 Temperature range.22
6.2 Relative humidity.23
6.3 Tests of the effect of the climatic environments .23
7 Electrical requirements and tests.24
7.1 Supply voltage.24
7.2 Heating.26
7.3 Insulation.26
7.4 Output elements.28
7.5 Functional requirements and tests.32
7.6 Electromagnetic compatibility (EMC) .32
7.7 Radio interference suppression.35

62052-21  IEC:2004(E) – 3 –
8 Test conditions and type test .35
8.1 Test conditions.35
8.2 Type test.35

Annex A (normative) Relationship between ambient air temperature and relative
humidity.36
Annex B (normative) Reference and limiting values of the influence quantities.37
Annex C (normative) Electromagnet for testing the influence of externally produced
magnetic fields .38
Annex D (informative) Test set-up for EMC tests.39
Annex E (informative) Test schedule.40
Annex F (informative) Acceptance tests .42

Bibliographie.44

Figure A.1 – Relationship between ambient air temperature and relative humidity .36
Figure C.1 – Electromagnet for testing the influence of externally produced magnetic fields .38
Figure D.1 – Test set-up for the test of immunity to electromagnetic RF fields .39
Figure D.2 – Test set-up for fast transient burst test .39

Table 1 – Clearances and creepage distances for insulating encased tariff and load
control equipment of protective class I .20
Table 2 – Clearances and creepage distances for insulating encased tariff and load
control equipment of protective class II .20
Table 3 – Temperature range.23
Table 4 – Relative humidity.23
Table 5 – Voltage range.24
Table 6 – Power consumption .25
Table 7 – Rated breaking voltages.28
Table 8 – Rated breaking currents .29
Table B.1 – Reference and limiting values .37
Table E.1 – Test schedule .40
Table F.1 − Single sample plan.43
Table F.2 − Double sample plan.43

– 4 – 62052-21  IEC:2004(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
ELECTRICITY METERING EQUIPMENT (AC) –
GENERAL REQUIREMENTS, TESTS AND TEST CONDITIONS –

Part 21: Tariff and load control equipment

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the cor
...

IEC 62052-21 ®
Edition 1.0 2004-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering equipment (a.c.) – General requirements, tests and test
conditions –
Part 21: Tariff and load control equipment

Équipement de comptage d’électricité (c.a.) – Prescriptions générales, essais et
conditions d’essai –
Partie 21: Equipement de tarification et de contrôle de charge

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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About the IEC
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International Standards for all electrical, electronic and related technologies.

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latest edition, a corrigenda or an amendment might have been published.

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anglais et en français, ainsi que les termes équivalents dans
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IEC 62052-21 ®
Edition 1.0 2004-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering equipment (a.c.) – General requirements, tests and test

conditions –
Part 21: Tariff and load control equipment

Équipement de comptage d’électricité (c.a.) – Prescriptions générales, essais et

conditions d’essai –
Partie 21: Equipement de tarification et de contrôle de charge

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 91.140.50 ISBN 978-2-8322-3039-8

– 2 – IEC 62052-21:2004  IEC 2004
CONTENTS
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Standard electrical values . 15
5 Mechanical requirements and tests . 15
6 Climatic conditions, requirements and tests . 21
7 Electrical requirements and tests . 23
8 Test conditions and type test . 34
Annex A (normative) Relationship between ambient air temperature and relative
humidity . 35
Annex B (normative) Reference and limiting values of the influence quantities . 36
Annex C (normative) Electromagnet for testing the influence of externally produced
magnetic fields . 37
Annex D (informative) Test set-up for EMC tests . 38
Annex E (informative) Test schedule . 39
Annex F (informative) Acceptance tests . 41

Figure A.1 – Relationship between ambient air temperature and relative humidity . 35
Figure C.1 – Electromagnet for testing the influence of externally produced magnetic
fields . 37
Figure D.1 – Test set-up for the test of immunity to electromagnetic r.f. fields . 38
Figure D.2 – Test set-up for fast transient burst test . 38

Table 1 – Clearances and creepage distances for insulating encased tariff and load
control equipment of protective class I. 19
Table 2 – Clearances and creepage distances for insulating encased tariff and load
control equipment of protective class II. 19
Table 3 – Temperature range . 22
Table 4 – Relative humidity . 22
Table 5 – Voltage range . 23
Table 6 – Power consumption . 24
Table 7 – Rated breaking voltages . 27
Table 8 – Rated breaking currents. 28
Table B.1 – Reference and limiting values . 36
Table E.1 – Test schedule . 39
Table F.1 − Single sample plan . 42
Table F.2 − Double sample plan . 42

INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
ELECTRICITY METERING EQUIPMENT (A.C.) –
GENERAL REQUIREMENTS, TESTS AND TEST CONDITIONS –

Part 21: Tariff and load control equipment

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62052-21 has been prepared by IEC technical committee 13:
Equipment for electrical energy measurement and load control.
This standard, in conjunction with IEC 62054-11 and IEC 62054-21, cancels and replaces
IEC 61038:1990, Electricity metering – Tariff and load control – Particular requirements for
time switches and all amendments. This standard is to be used in c
...

IEC 62052-21 ®
Edition 1.1 2016-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electricity metering equipment (a.c.) – General requirements, tests and test
conditions –
Part 21: Tariff and load control equipment

Équipement de comptage d’électricité (c.a.) – Prescriptions générales, essais
et conditions d’essai –
Partie 21: Equipement de tarification et de contrôle de charge

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
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Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 20 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 15
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
La recherche avancée permet de trouver des publications IEC
65 000 entrées terminologiques électrotechniques, en anglais
en utilisant différents critères (numéro de référence, texte,
et en français, extraites des articles Termes et Définitions des
comité d’études,…). Elle donne aussi des informations sur les
publications IEC parues depuis 2002. Plus certaines entrées
projets et les publications remplacées ou retirées.
antérieures extraites des publications des CE 37, 77, 86 et

CISPR de l'IEC.
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Restez informé sur les nouvelles publications IEC. Just Service Clients - webstore.iec.ch/csc
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
[e-mail].
IEC 62052-21 ®
Edition 1.1 2016-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electricity metering equipment (a.c.) – General requirements, tests and test

conditions –
Part 21: Tariff and load control equipment

Équipement de comptage d’électricité (c.a.) – Prescriptions générales, essais

et conditions d’essai –
Partie 21: Equipement de tarification et de contrôle de charge

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 91.140.50 ISBN 978-2-8322-3646-8

IEC 62052-21 ®
Edition 1.1 2016-11
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Electricity metering equipment (a.c.) – General requirements, tests and test
conditions –
Part 21: Tariff and load control equipment

Équipement de comptage d’électricité (c.a.) – Prescriptions générales, essais
et conditions d’essai –
Partie 21: Equipement de tarification et de contrôle de charge

– 2 – IEC 62052-21:2004+AMD1:2016 CSV
 IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
INTRODUCTION TO AMENDMENT 1 . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Standard electrical values . 16
5 Mechanical requirements and tests . 16
6 Climatic conditions, requirements and tests . 23
7 Electrical requirements and tests . 24
8 Test conditions and type test . 35
Annex A (normative) Relationship between ambient air temperatureand relative
humidity . 37
Annex B (normative) Reference and limiting values of the influence quantities . 38
Annex C (normative) Electromagnet for testing the influence of externally produced
magnetic fields . 39
Annex D (informative) Test set-up for EMC tests. 40
Annex E (informative) Test schedule . 41
Annex F (informative) Acceptance tests . 43
Bibliography . 45

Figure A.1 – Relationship between ambient air temperature and relative humidity .
Figure C.1 – Electromagnet for testing the influence of externally produced magnetic
fields. 39
Figure D.1 – Test set-up for the test of immunity to electromagnetic r.f. fields . 40
Figure D.2 – Test set-up for fast transient burst test . 40

Table 1 – Clearances and creepage distances for insulating encased tariff and load
control equipment of protective class I .
Table 2 – Clearances and creepage distances for insulating encased tariff and load
control equipment of protective class II .
Table 3 – Temperature range . 23
Table 4 – Relative humidity .
Table 5 – Voltage range . 24
Table 6 – Power consumption . 25
Table 7 – Rated breaking voltages .
Table 8 – Rated breaking currents .
Table B.1 – Reference and limiting values . 38
Table E.1 – Test schedule . 41
Table F.1 − Single sample plan .
Table F.2 − Double sample plan.

 IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
ELECTRICITY METERING EQUIPMENT (A.C.) –
GENERAL REQUIREMENTS, TESTS AND TEST CONDITIONS –
Part 21: Tariff and load control equipment
FOREWORD
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